If you are in an IVA, I am afraid not. at least not without the permission of your IP, which I doubt you would get. There are grants for funeral costs. I am sure the registrar can point you in the right direction when you register the death.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk